Overview of Features

The SOHO 76 and SOHO 77 routers are asymmetric digital subscriber line (ADSL) routers that provide entry-evel access to the Internet. The routers include an Ethernet interface and an ADSL interface. The ATM interface supports the AAL5 (ATM Adaptation Layer 5) format.

Memory Requirements

The memory required for running the SOHO 76 and SOHO 77 and 77H routers is as follows:

•8 MB of Flash memory

•16 MB of dynamic RAM (DRAM)

The Flash memory and DRAM cannot be upgraded.

Software Requirements

The SOHO 76, SOHO 77 and SOHO 77H routers support a subset of the IP/Firewall feature set.

Related Documents

The following documents provide additional information about installing and configuring these routers and configuring router software:

•Cisco 820 Series and SOHO Series Router Cabling and Setup Quick Start Guide—provides quick installation information for the Cisco SOHO series routers.

•Cisco 827 Routers Software Configuration Guide—provides sample networks and router configurations for the Cisco 827 routers. Only the data configurations in the guide apply to the SOHO 76 and 77 routers.

•Regulatory Compliance and Safety Informationfor the Cisco 800 Series and SOHO Series Routers document—provides safety warnings and compliance information for the router.

For more information on the Cisco DSL CPE image provisioning, refer to the following documents:

•Cisco DSL CPE Automated Configuration Solution Guide

•Cisco DSL CPE Manager

New and Changed Information

This section describes information that has changed from previous software releases. A number of configuration commands, and show and debug commands run from EXEC mode, are no longer available on the Cisco SOHO 76, 77, and 77H routers. The configuration commands are no longer necessary. The show and debug commands have been replaced by new commands that are described in the "Command Reference" section.

clear vpdn tunnel pppoe Command No Longer Supported

The following virtual private dial-up network (VPDN) clear commands will no longer work for Point-to-Point Protocol over Ethernet (PPPoE) client sessions.

Specifying the value client-id ethernet 0 means that the MAC address of the Ethernet interface will be used as the client ID when the DHCP request is sent. Otherwise, the MAC address of the BVI interface is used as the client ID.

Step 3 Configure the router to act as a DHCP server. This step is optional.

a. At the (config-if)#router prompt, enter the ip dhcp pool server name command.

b. Enter the import all command to have the router retrieve the Microsoft Windows name server (WINS) and Domain Name System (DNS) server addresses for name resolution.

Configuration Example

The following example shows a bridged RFC 1483 configuration with a static IP address. The default gateway address is provided by your service provider.

bridge irb

!

interface Ethernet0

ip address 192.168.1.1 255.255.255.0

no ip directed-broadcast

ip nat inside

!

interface ATM0

no ip address

no ip directed-broadcast

no atm ilmi-keepalive

!

interface ATM0.1 point-to-point

no ip directed-broadcast

pvc 1/35

!

encapsulation aal5snap

!

bridge-group 1

!

interface BVI1

ip address 194.152.25.53 255.255.255.0

!

no ip directed-broadcast

ip nat outside

!

!

!

ip route 0.0.0.0 0.0.0.0 192.152.25.1

!

access-list 1 permit 192.168.1.0 0.0.0.255

!

bridge 1 protocol ieee

bridge 1 route ip

Configuring PPP over Ethernet

This feature supports the PPPoE client on an ATM permanent virtual circuit (PVC). Only one PPPoE client on a single ATM PVC is supported. Figure 1 shows a typical deployment scenario for PPPoE support.

Note The PPPoE configuration procedure and example in this section are different from those appearing in previous editions of this release note. The vpdn enable and vpdn group commands have been removed from the procedure and example because they are no longer supported on the SOHO 77 or SOHO 77H routers.

Figure 1 PPPoE Deployment Scenarios

A PPPoE session is initiated on the client side by the network shown in Figure 1. If the session has a timeout, or if it is disconnected, the PPPoE client immediately attempts to reestablish the session.

Note Multiple PPPoE clients can run on a different PVCs, in which case, each client has to use a separate dialer interface and a separate dialer pool, and the PPP parameters must be applied on the dialer interface.

If you enter the clear pppoe command with a PPPoE client session already established, the PPPoE client session terminates and the PPPoE client immediately tries to reestablish the session.

Configuration Example

The following example shows a configuration of a PPPoE client.

!

interface Ethernet0

ip address 192.168.100.1 255.255.255.0

ip nat inside

!

interface ATM0

no ip address

no atm ilmi-keepalive

pvc 8/35

pppoe-client dial-pool-number 1

!

dsl operating-mode auto

hold-queue 224 in

!

interface Dialer1

ip address negotiated

ip mtu 1492

ip nat outside

encapsulation ppp

dialer pool 1

dialer-group 1

ppp authentication pap callin

ppp pap sent-username sohodyn password 7 141B1309000528

!

ip nat inside source list 101 interface Dialer1 overload

ip route 0.0.0.0.0.0.0.0 Dialer1

access-list 101 permit ip 192.168.100.0.0.0.0.255 any

!

MMI Support

The Modem Management Interface (MMI) is software that enables auto-provisioning for the SOHO 76, 77, and 77H routers. The MMI uses a fixed PVC to communicate with the proxy element (PE) that resides on the digital subscriber line access multiplexer (DSLAM). Using MMI, the router updates the running image. Then the router downloads the prescribed configuration using a configuration file or configuration values in a provisioning information database.

Configuring MMI for Auto-Provisioning

The customer premises equipment (CPE) can be automatically configured by using the Cisco digital subscriber line (DSL) CPE download, but the CPE can be configured only with the image provisioning feature. The following provisioning configuration files are not supported:

Follow these steps to configure the router for MMI support in configure-terminal mode:

Step 1 To set the configuration approach for MMI, enter one of the following commands:

mmi auto-configure

no mmi auto-configure

If the auto-configure parameter is enabled, the router is provisioned by the PE. By default, this parameter is enabled.

If the auto-configure parameter is disabled, the router is configured by the startup configuration file.

Step 2 To set the polling interval for the router to check the PE for any updated image or configuration files, enter the following command:

mmi polling-interval time

where time is the number of seconds. The polling-interval range is from 1 to 65535, with the default set to 60 seconds.

Step 3 To set the ATM PVC so the MMI communicates with the PE, enter the following command:

mmi pvcvpi/vci

where vpi/vci is the virtual path identifier/virtual channel identifier. The default PVC for MMI is 0/16 ilmi, but if it is not available, you must set the specific PVC for the router to communicate with the PE.

Step 4 To set the timer to monitor the image file download, enter the following command in configure terminal mode:

mmi snmp-timeouttime

where time is 1 to 1800 seconds, which is the allowed interval for downloading any two consecutive blocks. If you enter the no mmi snmp-timeout command, the default time is set to 180 seconds.

Step 5 To eliminate the ADSL line training delay, enter the following command:

dsl operating-mode auto

If the DSLAM is using a Cisco 4xDMT ADI-based card, enter the following command:

dsl operating-mode ansi-dmt

Step 6 To set up the debug process for MMI, enter the following command:

debug mmi

Step 7 Save the configuration file to NVRAM, and enter the reload command. The router's OK LED on the front panel blinks while the image is being auto-provisioned. The PVC is set up when the reboot occurs.

MMI Configuration Example

The following example shows an MMI configuration:

SOHO-voice1#sh run

Building configuration...

Current configuration :947 bytes

!

version 12.1

no service single-slot-reload-enable

no service pad

service timestamps debug uptime

service timestamps log uptime

no service password-encryption

!

hostname SOHO-voice1

!

no logging buffered

no logging buffered

logging rate-limit console 10 except errors

!

mmi polling-interval 1000

no mmi auto-configure

mmi pvc 0/16

debug mmi

ip subnet-zero

no ip finger

!

!

!

interface Ethernet0

no ip address

shutdown

!

interface Virtual-Template1

no ip address

!

interface ATM0

no ip address

pvc 0/101

!

bundle-enable

dsl operating-mode auto

ip classless

no ip http server

!

snmp-server manager

!

voice-port 1

!

voice-port 2

!

voice-port 3

!

voice-port 4

>

line con 0

transport input none

stopbits 1

line vty 0 4

login

!

scheduler max-task-time 5000

end

Notes for the DSL Provider

To use the Cisco automated configuration solution with SOHO 76, 77 and SOHO 77H CPE, follow these steps:

Step 2 Ping from the DSLAM to the CPE to ensure the DSLAM is a PE host.

Step 3 Store the MMI configuration file on an FTP server that acts as the PE's image server.

Step 4 Use CDCM to add the configuration file to the PE's image table. The image file can also be added to the PE.

Step 5 Use CDCM to deploy the CPE. You can manually deploy it, or you can use autodiscovery to deploy multiple CPEs.

Step 6 Use CDCM to provision an image for each CPE, which will associate a specific configuration file to the CPE.

Obtaining Documentation and Submitting a Service Request

For information on obtaining documentation, submitting a service request, and gathering additional information, see the monthly What's New in Cisco Product Documentation, which also lists all new and revised Cisco technical documentation, at:

Subscribe to the What's New in Cisco Product Documentation as a Really Simple Syndication (RSS) feed and set content to be delivered directly to your desktop using a reader application. The RSS feeds are a free service and Cisco currently supports RSS version 2.0.

This document is to be used in conjunction with the documents listed in the "Related Documents" section.